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FILE - In this June 18, 2008 handout file photo provided by the U.S. Navy, shows a developmental Standard Missile-3 (SM-3) launched from the U.S. Navy cruiser USS Lake Erie. Ever since President Ronald Reagan proposed building a ballistic missile shield to prevent a doomsday scenario, the idea has been dogged by an unanswered question: Will it work? (AP Photo/U.S. Navy, FILE)
/ AP